Brock screws Rock out of title @ Rumble, Brock wins title in Elimination Chamber, and the story for Mania goes from there. This way Rock doesn't have to frequently appear until RTWM kicks into high speed after EC like this year. However, if they have no conflicts with Rock holding the belt from Rumble to Mania where he faces Rumble or Chamber winner is cool too.

Pretty much. Brock vs. either Rock or Taker works for me, I personally don't see Rock sticking around between Rumble up to the RTWM so Brock interfering would be a good way to tie everything together I think. Heyman is the obvious connection, Punk gets to keep the belt, Rock doesn't need to lose clean (they'll save that for Cena I think) and you get a marquee match for Mania